Board of Directors

Steven B. Engle
Chairman of the Board of Directors and Chief Executive Officer
William K. Bowes Jr.
Chairman, Nominating & Governance Committee
Charles J. Fisher M.D.
Director
Peter Barton Hutt
Director
Patrick J. Scannon M.D., Ph.D.
Company Founder, Executive Vice President and Chief Biotechnology Officer
W. Denman Van Ness
Lead Independent Director and Chairman, Compensation Committee
Patrick J. Zenner
Director